Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/lib/lockdep/tests/ABCABC.c b/tools/lib/lockdep/tests/ABCABC.c
index b54a08e..a1c4659 100644
--- a/tools/lib/lockdep/tests/ABCABC.c
+++ b/tools/lib/lockdep/tests/ABCABC.c
@@ -13,4 +13,8 @@
 	LOCK_UNLOCK_2(a, b);
 	LOCK_UNLOCK_2(c, a);
 	LOCK_UNLOCK_2(b, c);
+
+	pthread_mutex_destroy(&c);
+	pthread_mutex_destroy(&b);
+	pthread_mutex_destroy(&a);
 }